Effective Biological DeNOx of Industrial Flue Gas by the Mixotrophic Cultivation of an Oil-Producing Green Alga Chlorella sp C2
Effective Biological DeNOx of Industrial Flue Gas by the Mixotrophic Cultivation of an Oil-Producing Green Alga Chlorella sp C2
复制标题
通过产油绿藻小球藻 sp C2 的混合营养培养对工业烟气进行有效的生物脱硝
DOI：
10.1021/acs.est.5b04696
复制
发表时间：
2016-02-02
影响因子：
11.4
通讯作者：
Wang, Qiang
中科院分区：
文献类型：
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作者：
Chen, Weixian;Zhang, Shanshan;Wang, Qiang
氮氧化物（NOx）是化石燃料烟气中最严重的环境污染物。我们以前表明，氮氧化物的微藻生物去除似乎优于传统的治疗上级。本研究通过流加混合营养培养优化了微藻烟气脱硝的策略。以实际烟气固定盐（FGFS）为氮源，在5L生物反应器中对高NOx吸收效率的绿色小球藻C2的混合营养培养进行了逐步优化，最大生物产量为9.87 g L-1d（-1）。优化策略进一步扩大到50 L，生物质生产率为7.93 g L-1 d（-1），总脱硝效率为96%沿着平均氮CR为0.45 g L-1 d（-1），脂质生产率为1.83 g L-1 d（-1）。通过优化的混合培养，进一步证明了利用小球藻进行高效烟气生物脱硝和微藻产品生产相结合的可行性。因此，这项研究显示了一个有前途的工业战略，在有限的土地面积的工厂烟气生物处理。
Nitrogen oxides (NOx) are the components of fossil flue gas that result in the most serious environmental concerns. We previously showed that the biological removal of NOx by microalgae appears superior to traditional treatments. This study optimizes the strategy for the microalgal-based DeNOx of flue gas by fed-batch mixotrophic cultivation. By using actual flue gas fixed salts (FGFS) as the nitrogen supply, the mixotrophical cultivation of the green alga Chlorella sp. C2 with high NOx absorption efficiency was optimized in a stepwise manner in a 5 L bioreactor and resulted in a maximum biomass productivity of 9.87 g L-1 d(-1). The optimized strategy was further scaled up to 50 L, and a biomass productivity of 7.93 g L-1 d(-1) was achieved, with an overall DeNOx efficiency of 96%, along with an average nitrogen CR of 0.45 g L-1 d(-1) and lipid productivity of 1.83 g L-1 d(-1). With an optimized mixotrophical cultivation, this study further proved the feasibility of using Chlorella for the combination of efficient biological DeNOx of flue gas and microalgae-based products production. Thus, this study shows a promising industrial strategy for flue gas biotreatment in plants with limited land area.